"All addicts, regardless of the substance or their social status share a consistent and obvious symptom; they’re not quite present when you talk to them. They communicate to you through a barely discernible but unignorable veil. Whether it’s a homeless smackhead troubling you for 50p for a cup of tea or a coked-up, pinstriped exec foaming off about his ‘speedboat’ there is a toxic aura that prevents connection. They have about them the air of elsewhere, that they’re looking through you to somewhere else they’d rather be. And of course they are. The priority of any addict is to anaesthetise the pain of living, to ease the passage of the day with some purchased relief."
— from Russell Brand’s moving eulogy for Amy Winehouse
http://www.russellbrand.tv/2011/07/for-amy/